WWZMDiB5Pcs HC-SR04 Ultrasonic Sensor Module for Arduino R3 MEGA Mega2560 Duemilanove Nano Robot XBee ZigBee (5Pcs HC-SR04 with Mounting Bracket)

Very good

Good value, works as expected.

Arrived quickly and plugged right in. Using them for my Wall-E project.

I bought these for the plastic holders, so take that into consideration in this review (and why I even gave them three stars). The sensors don't push all the way into the holders, so they just loosely hang there, ready to fall out. See picture. Even turning them upside down, so the pins face up, the same issue, and the same if you install from the backside. They simply do not fit snugly as have the MANY I have used in the past. This makes them useless unless you file the plastic holder at the top to make them fit; hoping to not break them and of course, making it so you cannot return them. WHAT WERE THEY THINKING?